I have a 1990 integra and almost always let the thing warm up completly before driving it but If i happen to take it out a minute or two early and the o2 sensor is not yet warmed up (giving ecu info) than it feels exactly like when the MAP sensor is disconnected..When you floor it it chugs pops and back fires, the vehivle jerks around and doesnt wanna move (kinda scary to give it gas) soo i usually pull over on the road to let it sit for a minute to regain its sanity... Im going to buy some stuff from a guy parting out a DA soo i may just pick up the Map if its bad, what do you guys think ??

 

man i have the same problem lately since the weather has gotten colder...plz help us lol

 

standalone ecm?

 

Help

 

SOLD HONDATA, but im going chrome/turboedit soon, i dont think its a major ecu prob cause it only malfunctions for a minute or two and let it sit on the road side and its fine but damn when u try to give it gas It wont move it just feels/sounds like compete garbage

 

if running in closed loop the ecm will not correct until sensor warms up thus it cannot provide + or - fuel . Once the sensor warms up and it runs fine its because the computer is now correcting. Sounds like your base fuel map is off. Just a guess.

 

feels much more like the MAP sensor if u were to disconnect ur map sensor and try to get around the block you'd hate yourself, The car runs like compete and utter ****, once past like 1500 rpm its has no clue whats going on and backfires like crazy... its when its warming up it runs weird... Its like during the transition from closed to open it just goes crazy>?/

 

Why not run in open loop all the time?

 

so when it is warmed up it runs fine?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">Why not run in open loop all the time?</TD></TR></TABLE>

wondering the same. We never run in closed loop.

 

u never run in closed loop??? the o2 sensor has to heat up somehow and on a one wire its not going to heat its self??... well i dont run it untill its warmed up soo i cant tell u if it runs bad but when its just about to change to open loop the car runs bad and after that its fine and just before that its fine...???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R6E6I6D &raquo;</TD></TR><TR><TD CLASS="quote">u never run in closed loop???</TD></TR></TABLE>

Nope. Never have. No reason to. Only time is when I was helping tune an RSX and the TPS was messed up.

 

how do u not run in closed loop.... U mean u dont drive in closed loop? im kinda lost...

 

I run open loop with AEM EMS, Crome, KPro, etc.

 

huh? u lost me... closed loop meaning ur comp cant recieve info from o2 untill 400º or something how do u run it in open automatically??? hardly makes sense to me?

 

In the computers he is running there is maybe an option to stay in open loop at all times. Therefor not running in closed loop. I run only open loop with uberdata. I cant really drive hard until the car is warmed up. Say around 180 degrees or so. It runs lean before that.

 

if a car runs lean, rich or poorly before warming up and is in mechanically good condition i would say the tuning on it is poorly done.

 

yep I agree, warm up enrichment, temp compensation off etc

 

ok guys well i really appreciate the help, Im going to try and solve that problem... thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NLR &raquo;</TD></TR><TR><TD CLASS="quote">yep I agree, warm up enrichment, temp compensation off etc</TD></TR></TABLE>
Yeh, Im working on that issue in uberdata. It is acting up.

 

pretty annoying... But again thanks guys and good luck figureing out this problem